31000011211 has 12 divisors (see below), whose sum is σ = 33738491952. Its totient is φ = 28470108576.

The previous prime is 31000011209. The next prime is 31000011227. The reversal of 31000011211 is 11211000013.

It is not a de Polignac number, because 31000011211 - 2¹ = 31000011209 is a prime.

It is a super-2 number, since 2×31000011211² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31000011011) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 432271 + ... + 498856.

It is an arithmetic number, because the mean of its divisors is an integer number (2811540996).

Almost surely, 2^31000011211 is an apocalyptic number.

31000011211 is a deficient number, since it is larger than the sum of its proper divisors (2738480741).

31000011211 is a wasteful number, since it uses less digits than its factorization.

31000011211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931350 (or 931337 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 31000011211 its reverse (11211000013), we get a palindrome (42211011224).

The spelling of 31000011211 in words is "thirty-one billion, eleven thousand, two hundred eleven".